The term 'Symbol of Blackness' can be represented by two crossword solutions: SOOT and COAL. SOOT is a black powdery or flaky substance composed primarily of amorphous carbon, produced by the incomplete combustion of organic matter. COAL is a combustible black or brownish-black sedimentary rock, formed over millions of years from the remains of land-based plants and animals. Both SOOT and COAL are often associated with blackness due to their dark color.